AWWA WQTC64061

The MIEX dissolved organic carbon (DOC) process was developed specifically to remove natural organic matter (NOM) from raw water sources and improve the efficiency of coagulant and disinfectant chemicals. The lower NOM and reduced disinfectant demand following MIEX treatment results in reduction in the formation of disinfection byproducts. NOM is also known to reduce the effectiveness of granular activated carbon (GAC) for the removal of problem contaminants by blocking or utilizing adsorption sites. It is anticipated that the reduction in NOM resulting from the MIEX DOC process would also improve the performance of GAC. A pilot plant study was undertaken to directly measure the impact of MIEX pretreatment using both coagulation and microfiltration on GAC performance. Includes 10 references, tables, figures.